Absence of protective effect of oral contraceptive use on the development of rheumatoid arthritis: a meta-analysis of observational studies.
Int J Rheum Dis. 2014 Sep;17(7):725-37. doi: 10.1111/1756-185X.12413. Epub 2014 Sep 8.
Int J Rheum Dis. 2014.
PMID: 25196669
Review.